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RS-232/422/485 Connections
Documentation Number: ESR90xW-4905m Appendix B 31
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
A
A
p
p
p
p
e
e
n
n
d
d
i
i
x
x
B
B
:
:
R
R
S
S
-
-
2
2
3
3
2
2
/
/
4
4
2
2
2
2
/
/
4
4
8
8
5
5
C
C
o
o
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c
c
t
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s
DB-9 Pin-outs for RS-232 and RS-232/422/485
Connections
DB-9M
Pin
RS-232
Signal Name
RS-232 DTE RS-422 RS-485
1 Carrier Detect DCD In TXDA(-)
2 Receive Data RXD In TXDB(+)
3 Transmit Data TXD Out RXDB(+) DATA B(+)
4 Data Terminal Ready DTR Out RXDA(-) DATA A(-)
5 Signal Ground GND --- GND GND
6 Data Set Ready DSR In
7 Request To Send RTS Out
8 Clear To Send CTS In
9 Ring Indicator RI In
Figure 19. DB-9 Pin-outs for RS-232/422/485
RS-232/422/485 Connections
32 Appendix B Documentation Number: ESR90xW-4905m
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
Terminal Block Pin-out for RS-422 and RS-485
(Vlinx ESR901W485 only)
1
2
3
4
5
G
N
D
T
X
D
A
(
-
)
T
X
D
B
(
+
)
R
X
D
B
(
+
)
/
D
a
t
a
(
+
)
R
X
D
A
(
-
)
/
D
a
t
a
(
-
)
Terminal
2
2
RS-422
Signal Name
RS-485
RS-485
Signal Name
1 (+) Transmit Data (+) -- --
2
A
(-) Transmit Data (-) -- --
3 (+) Receive Data (+) Data(+) Data(+)
4
A
(-) Receive Data (-) Data(-) Data(-)
5
D
Signal Ground GND Ground
Figure 20. Terminal Block Pin-out for Vlinx ESR901W485 Serial
Connection